Smallpox, measles or flu were common diseases brought from Europe responsible for killing large portions of the Native American population.
When the Europeans arrived, carrying diseases which thrived in dense, semi-urban populations, the indigenous people of America were effectively doomed. that they had never experienced smallpox, measles or flu before, and also the viruses tore through the continent, killing an estimated 90% of Native Americans.
In the ensuing email exchange, Thornton indicated that his own rough estimate is that about 12 million indigenous people died in what's today the coterminous us between 1492 and 1900.
Native Americans died in massive numbers from infections endemic among Europeans. Much of this was related to tract infections, including smallpox, tuberculosis, measles, and influenza.
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